A model for predicting the formation of a berm including the back slope landward of the berm top was developed on the basis of the contour-line-change model (Serizawa et al., 2003) which solves the beach changes on the x-y plane. The validity of the model was tested by the comparison with the experimental results. The experimental and predicted changes in longitudinal profile were in good agreement. The model was further applied to predict the berm formation during the sea level rise and fall periods.
